Axiom Math announced the completion of a computerized formalization of the classification theorem for finite simple sets, or the "Great Theorem", one of the greatest achievements in 20th century mathematics. Theorem [note=6469|classified] finite simple mathematical groups - the basic elements from which any finite group can be formed, just as complex numbers are factored. The work on his proof has been going on for more than half a century. In 1963, the American mathematicians Walter Pate and John Griggs Thompson [note=6468|proved] that the order of every finite non-abelian group is even. Daniel Gorenstein managed to complete the sorting in 1983, and in 2004 Michael Ashbacher and Steven D. Smith published a 1,221-page summary, completing what became known as the first bullet of evidence. It was precisely this formalization that axiom mathematics dealt with.